Elbow



l. WATSON.

ELBOW. APPLICATION FILED DEC. 24. i917.

"1-,333,195. v Patented Mar. 9,1920.

JAMES WATSON, or iuanrnnrrn, Wisconsin.

ELBow.

Specificaticn of Letters l atent.

Patented Mar. 9,1920.

Application filed December 24, 1917. Serial No. 208,594. g j

To 0:27 whom it may concern Be it known that I, JAMES NArsov, a citizen ofthe United States, residing at Mart iii-"tie, in the county of lrlai'inette and Stat: of ll'isconsin, have invented a new and useful Elbow, of which the following is a speci titration.

It is the object of this invention to provide a stove pipe elbow which may be folded flat, means being provided for rendering the elbow draft-tight at its joints, and for holding the elbow in condition for use.

l't is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

lVith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings z- Figure 1 shows the invention in side elevation, parts being broken away;

F 2 is a cross section on the line 2 2 of Fig. 1;

Fig; 8 is a fragmental section taken a, proximately on the line 33 of Fig. l; h I Fig. l: is a vertical section taken through the parts which form the inner angle of the elbow;

Fig. 5 is a perspective view wherein the elbow is shown folded fiat; and

Fig. 6 is a transverse section wherein the pipe is shown folded fiat. The structure forming the subject matter of this application preferably is made oi": meta-l throughout. The elbow includes rectangularly disposed members 1 and 2 each of which is rectangular in cross section as Fig. 2 will make manifest, this view being equally applicable to both members of the elbow. The member 1 of the elbow includes an inner wall 3, side walls 1 and an outer wall 5. The. member 2 of the elbow includes an inner wall 6, side walls 7 and an outer wall 8. The inner wall 3 is united with the side walls 4 by means of hinges 9, the side walls 4 being united with the outer wall 5 by means of hinges 10. The inner wall 6 of the member 2 is united with the side walls 7 by means of hinges 11, and hinges 12 connect the side walls 7 with the outer wall 8. The hinges above alluded to extend longitudinally of the various walls and preferably are of the usual knuckle and pin construction. The transverse edge of the outer wall 8 of the member 2 is united with the transverse e lge of the outer wall 5 of the .member 1 by means of a hinge 14:. The

cooperating edges of the walls 7 and 4 are mitered as shown at 15. The upper edge of the inner wall 3 of the member 1 is folded downwardly upon itself and is inclined outwardly to form a trough 16 terminating in an upstanding lip .17, these parts extending across the upper edge of the wall 3. The inner wall 6 of the member 2 of the elbow is fashioned into downwardly inclined tongue 18, received in the trough 16, thus affording a secure closure along the line where the walls 3 and 6 coact. The side walls 1 of the member 1 are folded downwardly and inwardly along the edges 15 to,

forn a trough 19 terminating in an upstanding hp 20. The sidewalls 7 of the member 2, adjacent the mitered edges 15, are set as at 21 to form tongues 22reinwardly ceived in the trough 19 and affording tight joints adjacent the edges 15. I

In order to hold the parts 1 and 2 of the elbow in the positions shown in Fig. 1, latches are employed, the latches preferably being in the form walls 7 ofthe member 2 being provided with eyes 25 wherein the bills of the hooks 23 are received. These eyes, if desired, may be in the form of openings, fashioned in. the walls 7. The longitudinal edges of the walls 7, 6 and 8 of the member 2 may be left free,

ber 2 being swung over, on the hinge 14, in* the direction of the arrow A in Fi 1, until the outer wall 8 of the member 2lies against the outer wall 5 of the member 1. Then,

of hooks 23 pivoted at 24' to the side walls 4 of the member 1, the side both of the members 1 and 2 may be col.- lapsed, by pushing them laterally in the samedirection, the structure then appearing as shown in Fig. 5, the wall 3 and one of the walls 4 lying flat against the outer wall 5, the other wall 4: extending outwardly from the wall 5 in approximate alinement therewith, and the wall 3 resting against the wall 4, the. constituent walls of the member 2 being flattened out in a similar way.

Having thus described the invention, what is claimed is:

A stove pipe elbow comprising angularly disposed members of rectangular cross section having mitered cooperating edges, each member of the elbow including walls; means for hingedly uniting the'longitudinal edges of the walls of each member of the elbow, whereby each member may be folded fiat; means for hingedly uniting the members of the elbow along the transverse edges of one wall of each of the members of the elbow whereby said members, having been folded fiat, may be folded against each other, the transverse edges of the other walls of the members of the elbow being provided with interengaging elements which afford drafttight joints; and means for releasably connecting the member of the elbow to hold said elements interengaged.

In testimony that I claim the foregoing as my own, I have hereto aliixed my signs ture.

J AMES i VATSON. 

